Blackmagic Cinema Camera & Epic?

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LoganStewartDP

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Blackmagic Cinema Camera & Epic?

PostSat Mar 15, 2014 10:52 pm

Anybody shot anything mixing the two formats? Preferably music videos. Shooting the epic portion of the music video I'm working on next sunday and was wondering if anybody have any experience with this.
thanks! :D
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Hugh Antonio

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Re: Blackmagic Cinema Camera & Epic?

PostSat Mar 15, 2014 11:21 pm

Filming wise or post production?
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Re: Blackmagic Cinema Camera & Epic?

PostSat Mar 15, 2014 11:32 pm

Works fine. It's normally an issue of matching the BM to the Epic since it has slightly more dynamic range, but when you're in the color suite, and assuming you're delivering 1080p, it's hard to tell the difference. I prefer to use an MFT mount so then I can PL to whatever lenses the Epic had, though.

Just recently B-Camed a pocket for a few macro shots with an Epic (epic was on compact Primes, and went with a Nikon 60mm F2.8 Macro... slight difference in look) but worked out fine. The BM Raw will have a lot more information in it than anything off of the Epic.
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Alexander Arndt

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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 12:04 am

especially resolve handles both footages as i had expierenced, for the red raw its just a matter of what compression you choose, when you have the workstation, in davinci resolve i really liked to make the different curves etc what you can choose from the red material...it will make fun for sure.
Last edited by Alexander Arndt on Sun Mar 16, 2014 6:32 pm, edited 1 time in total.
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Chris Hocking

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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 6:55 am

We've done a few jobs now where our main camera is an EPIC, but we'll use a BMCC for VFX pickups (shooting RAW). Works great.
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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 7:07 am

My girlfriend shot this with my BMCC and my friend's Epic. Looks just great.


And I shot this on my camera and a Scarlett. If you can tell what was shot on what, you've got a pretty damn good eye.
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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 9:47 am

IMHO the lenses used are more important to match them than anything else. As long as you don't need off speeds and deliver 1080p, they are damn close, but watch out for moiré on the BMCC.
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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 11:39 am

Uli Plank wrote:IMHO the lenses used are more important to match them than anything else. As long as you don't need off speeds and deliver 1080p, they are damn close, but watch out for moiré on the BMCC.


Very much agreed. I've been doing some very detailed testing of BMCC vs. RED EPIC DRAGON, and the Voigtländer lenses on the BMCC are really giving the Canon L glass on the DRAGON a run for their money. Once I get Cine glass for the DRAGON, I expect it will be much less of a contest. That said...

Using identical apertures and frame rates (therefore the same light hitting the sensors) the DRAGON really does see 3 stops deeper into the highlights. But the BMCC seems to have a stop more sensitivity before noise starts to pick up. The simple interpretation there would be to expose the DRAGON +1 stop, giving equal performance before noise picks up and still benefit from 2 stops more highlight protection. But my testing suggests that actually the noise of the DRAGON is so organic (for lack of better term), it can actually be pushed down in post very, very nicely. The noise of the BMCC is not nearly as easily discharged. Notably, the BMCC noise tends to posterize in blotches, compared with the DRAGON, which remains granular all the way. The EPIC does not have the extra DR of the DRAGON, but I believe it does have a much better noise pattern in the shadows.

Looking at the images of both in Resolve, the gamma curves and LUTs you start with can convince you that there is as much as a +/- 1.5 stop difference in exposure at the same ISO/aperture/frame rate settings. (Shoot a DSC Labs CamAlign waveform chart and you'll see differences in where the "X" sits, low, high, and in the middle.) Which means that you really should decide what your grading start point is going to be and then expose appropriately so that those two starting points don't diverge too much. RC3/RG3 looks very different than BMD Film->REC 709. RED RAW -> Arri CineLog -> REC 709 also looks different than BMD Film -> REC 709, and not only in terms of how reds, greens, and blues look. They are different in terms of where they place mid-tones, shadows, and highlights. Davinci Resolve is a powerful tool for getting the cameras to agree, and it doesn't take long, but you don't want to find you underexposed one camera compared to the other by 1.5 stops due to an unfortunate choice of base gamma and one-light correction. In my tests, 80% of the time it was the EPIC that needed more base exposure to come to agreement with the BMCC, but 20% of the time it was the other way around. If you don't have time for a test, you could factor the probabilities and over-expose the RED by 1 stop, which would give you an 80% chance of being within 1/2 stop of perfect. But also a 20% chance of being off by more than 2 stops.

If you use the same lenses on both, if you expose properly so that your one-light corrections effectively show that your base exposures agree, and if you don't make the camera's weakest point the principal subject of the image, you will do great. Unless of course you trigger moire on the BMCC. The best solution to that problem is coverage: always have at least one other shot that can cover whatever was ruined by moire!
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LoganStewartDP

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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 3:32 pm

Joel Crane wrote:My girlfriend shot this with my BMCC and my friend's Epic. Looks just great.


And I shot this on my camera and a Scarlett. If you can tell what was shot on what, you've got a pretty damn good eye.


Challenge accepted! lol
For your girlfriend's music video I'm going to say everything except the performance is blackmagic.
For your music video I'm going to say the opening wood stuff was the scarlett and the performance part is the blackmagic.

Though I may be wrong on both because everything looks so good! :D
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LoganStewartDP

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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 3:41 pm

Michael Tiemann wrote:
Uli Plank wrote:IMHO the lenses used are more important to match them than anything else. As long as you don't need off speeds and deliver 1080p, they are damn close, but watch out for moiré on the BMCC.


Very much agreed. I've been doing some very detailed testing of BMCC vs. RED EPIC DRAGON, and the Voigtländer lenses on the BMCC are really giving the Canon L glass on the DRAGON a run for their money. Once I get Cine glass for the DRAGON, I expect it will be much less of a contest. That said...

Using identical apertures and frame rates (therefore the same light hitting the sensors) the DRAGON really does see 3 stops deeper into the highlights. But the BMCC seems to have a stop more sensitivity before noise starts to pick up. The simple interpretation there would be to expose the DRAGON +1 stop, giving equal performance before noise picks up and still benefit from 2 stops more highlight protection. But my testing suggests that actually the noise of the DRAGON is so organic (for lack of better term), it can actually be pushed down in post very, very nicely. The noise of the BMCC is not nearly as easily discharged. Notably, the BMCC noise tends to posterize in blotches, compared with the DRAGON, which remains granular all the way. The EPIC does not have the extra DR of the DRAGON, but I believe it does have a much better noise pattern in the shadows.

Looking at the images of both in Resolve, the gamma curves and LUTs you start with can convince you that there is as much as a +/- 1.5 stop difference in exposure at the same ISO/aperture/frame rate settings. (Shoot a DSC Labs CamAlign waveform chart and you'll see differences in where the "X" sits, low, high, and in the middle.) Which means that you really should decide what your grading start point is going to be and then expose appropriately so that those two starting points don't diverge too much. RC3/RG3 looks very different than BMD Film->REC 709. RED RAW -> Arri CineLog -> REC 709 also looks different than BMD Film -> REC 709, and not only in terms of how reds, greens, and blues look. They are different in terms of where they place mid-tones, shadows, and highlights. Davinci Resolve is a powerful tool for getting the cameras to agree, and it doesn't take long, but you don't want to find you underexposed one camera compared to the other by 1.5 stops due to an unfortunate choice of base gamma and one-light correction. In my tests, 80% of the time it was the EPIC that needed more base exposure to come to agreement with the BMCC, but 20% of the time it was the other way around. If you don't have time for a test, you could factor the probabilities and over-expose the RED by 1 stop, which would give you an 80% chance of being within 1/2 stop of perfect. But also a 20% chance of being off by more than 2 stops.

If you use the same lenses on both, if you expose properly so that your one-light corrections effectively show that your base exposures agree, and if you don't make the camera's weakest point the principal subject of the image, you will do great. Unless of course you trigger moire on the BMCC. The best solution to that problem is coverage: always have at least one other shot that can cover whatever was ruined by moire!


thank you for this! I've worked with both cameras separately but never together. The epic does get pretty noisy at it's "base" asa. I shot the first day of the video (performance part) on the blackmagic and rated the camera at 400 to combat the noise in the image when it sees certain colors (mainly purple and blue) then lit the artist 2 stops over key on one side and key level on the other side. I noticed from earlier testing that rating the blackmagic at 400 seems to give it richer black and a more contrasty image as one might see from the epic. This is a rough cut of just the performace with the footage ran through the ACES color space then a slight curve. There is alot more exposure in the raw footage so the grading is rough ;)
Last edited by LoganStewartDP on Mon Mar 17, 2014 12:08 am, edited 1 time in total.
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Re: Blackmagic Cinema Camera & Epic?

PostSun Mar 16, 2014 11:29 pm

Fun video, but you need to clean up the black dots that invade the image when the moving lights hit the BMCC dead-on (dance scenes in warehouse).
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